Convert most of extensions and some other random stuff to using the base namespace for Values.

sync/protocol/sync_protocol_error.h

Index: sync/protocol/sync_protocol_error.h
diff --git a/sync/protocol/sync_protocol_error.h b/sync/protocol/sync_protocol_error.h
index 3fe52badba2927792da1d86e02cd4232e0db2538..be9232d21989f4dbd6469f7c1c41b002d21a2cb2 100644
--- a/sync/protocol/sync_protocol_error.h
+++ b/sync/protocol/sync_protocol_error.h
@@ -78,7 +78,7 @@ struct SYNC_EXPORT SyncProtocolError {
   ModelTypeSet error_data_types;
   SyncProtocolError();
   ~SyncProtocolError();
-  DictionaryValue* ToValue() const;
+  base::DictionaryValue* ToValue() const;
 };
 
 SYNC_EXPORT const char* GetSyncErrorTypeString(SyncProtocolErrorType type);